Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period) (I23) ICD-10-CM
The I23 code range covers certain current complications following st elevation (stemi) and non-st elevation (nstemi) myocardial infarction (within the 28 day period) with 10 ICD-10-CM diagnosis codes. 9 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the I23 Range 10 codes · 9 billable
- I23 Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)Non-billable
- I23.0 Hemopericardium as current complication following acute myocardial infarction
- I23.1 Atrial septal defect as current complication following acute myocardial infarction
- I23.2 Ventricular septal defect as current complication following acute myocardial infarction
- I23.3 Rupture of cardiac wall without hemopericardium as current complication following acute myocardial infarction
- I23.4 Rupture of chordae tendineae as current complication following acute myocardial infarction
- I23.5 Rupture of papillary muscle as current complication following acute myocardial infarction
- I23.6 Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction
- I23.7 Postinfarction angina
- I23.8 Other current complications following acute myocardial infarction
About the I23 Code Range
These are current complications after a heart attack described as ST elevation (STEMI) or non-ST elevation (NSTEMI). The category applies within the period named in its title.
The subdivisions separate the complications by what happens and where. I23.0 names hemopericardium, or blood around the heart. I23.1 and I23.2 distinguish atrial and ventricular septal defects. I23.3, I23.4, and I23.5 distinguish ruptures by the affected heart structure. I23.6 describes blood clots in named parts of the heart. I23.7 names angina after a heart attack, while I23.8 names other current complications.
Questions About This Page
How many billable codes are in the I23 range?
Of the 10 codes in this range, 9 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the I23 range classify?
The range classifies certain current complications following st elevation (stemi) and non-st elevation (nstemi) myocardial infarction (within the 28 day period). Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
